I have a kitchen full of select alder doors that change with the season. They were finished with a oil base stain and a water base catalyzed finish. The wood grain raises during the winter and goes completely flat in the summer. It is only about 10 - 20% of most of the door surfaces that does this. The raise also appears to be focused at the outer edges of the larger flat areas produced in the outer plain cuts of the timber. While not as pronounced, reminds me of the way a deck weathers.The finish materials rep suggested it was checking, though he has not seen it and in my research on checking, checking appears to cover the entire surface and actually cracks the finish.I did refinish the raised area on one of the doors and had to sand through the finish and sand the wood in order to make the surface flat. This problem has recurred on this door after a year as well as re-appear on all doors.Anyone have this happen to them. that could help me get to the root of this problem?I feel it has something to do with the wood versus the finish, but really don't know.